Solve the Equation $$x ^ { 2 } - 13 = 0$$

Solve the equation.
- $$x ^ { 2 } - 13 = 0$$

A) $\pm \sqrt { 13 }$
B) $\pm 13$
C) $\pm \mathrm { i } \sqrt { 13 }$
D) $\pm 13 \mathrm { i }$